CSS - PMS - CCE - PCS - General Science
Global Warming
Which action addresses global warming at its source?
A. Building only taller sea walls
B. Measuring rainfall without emission changes
C. Reducing net greenhouse-gas emissions
D. Changing clock time
Correct Answer: C
Emission reductions are mitigation; adaptation manages impacts.
CSS - PMS - CCE - PCS - General Science
Global Warming
Which global temperature quantity is commonly tracked to assess warming?
A. Temperature at one weather station only
B. Ocean salinity only
C. Temperature of one city
D. Change in global mean surface temperature relative to a baseline
Correct Answer: D
Global warming is assessed using combined land and ocean temperature datasets over time.
CSS - PMS - CCE - PCS - General Science
Global Warming
Why is methane important to global warming?
A. It is a potent greenhouse gas with strong warming influence per molecule over relevant time horizons
B. It is not a greenhouse gas
C. It blocks all sunlight
D. It is the main component of oxygen
Correct Answer: A
Methane absorbs infrared radiation and contributes significantly to anthropogenic warming.
CSS - PMS - CCE - PCS - General Science
Global Warming
Does the presence of a cold day disprove global warming?
A. No, short-term local weather variability can occur within a long-term warming trend
B. Yes, one cold day disproves all long-term data
C. Only in winter
D. Only in the tropics
Correct Answer: A
Climate trends are assessed over long periods and broad spatial scales.
CSS - PMS - CCE - PCS - General Science
Global Warming
Which measure can reduce warming from electricity generation?
A. Removing energy efficiency
B. Increasing uncontrolled coal burning
C. Burning forests
D. Replacing high-carbon fossil generation with low-carbon energy sources
Correct Answer: D
Decarbonizing power generation reduces CO2 emissions.
CSS - PMS - CCE - PCS - General Science
Global Warming
How can deforestation contribute to global warming?
A. It releases stored carbon and reduces carbon uptake by vegetation
B. It increases the number of carbon sinks
C. It has no effect on carbon cycling
D. It removes all greenhouse gases
Correct Answer: A
Forest loss can both emit CO2 and reduce future sequestration.
CSS - PMS - CCE - PCS - General Science
Global Warming
Which feedback can amplify warming when snow and ice melt?
A. Sound feedback
B. Magnetic feedback
C. Ice-albedo feedback
D. Tidal feedback
Correct Answer: C
Less bright ice means more solar energy is absorbed by darker land or ocean surfaces.
CSS - PMS - CCE - PCS - General Science
Global Warming
Which greenhouse gas is emitted in large quantities by fossil-fuel combustion?
A. Neon
B. Carbon dioxide
C. Argon
D. Helium
Correct Answer: B
Combustion of coal, oil and gas oxidizes carbon to CO2.
CSS - PMS - CCE - PCS - General Science
Global Warming
What is the primary cause of recent global warming?
A. Human-caused increase in greenhouse gases
B. Increase in atmospheric oxygen
C. Changes in Earth's core only
D. Tides only
Correct Answer: A
Scientific assessments attribute most recent warming to anthropogenic greenhouse-gas emissions.
CSS - PMS - CCE - PCS - General Science
Global Warming
What does global warming specifically refer to?
A. Natural seasons only
B. Daily noon temperature
C. Any local heat wave
D. Long-term increase in Earth's average surface temperature
Correct Answer: D
Global warming is the long-term rise in global mean temperature, a major component of climate change.